<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>inputNumber计数器</title>
  <link rel="stylesheet" href="./inputNumber.css">
  <script src="./inputNumber.js"></script>
</head>
<body>
  <div class="l-inputNumber" step="1">
    <div class="l-reduce">-</div>
    <div class="l-inputNumber-input">
      <input type="text" value="1">
    </div>
    <div class="l-add">+</div>
  </div>
</body>
</html>